I N D E X 1 0 2 7 financial help for, AE on, 341 German Empress cactus for, 47, 51, 589, 600, 635, 667 harsh tone of letters of, AE on, 174–175 house purchase of, mortgage, 410, 435, 912a, 915a invites AE to Zurich, 86 Karr-Krüsi, Albert, fund managed by 892a pleased with AE’s friendly words, 769 relationship of with AE, lviii–lix, 96, 102, 120 AE pleased with, 767 requests loan, AE declines, 238 AE consents, 327 on securities at Ladenburg and Thalmann, 589 talks with Knecht’s father, 325 thanks for AE’s present, 48 Einstein-Stiftung, board of Freundlich on next meeting of, 882a Ludendorff on next meeting of, 882a members AE requests new representative of minister of culture in, 882a Fischer proposed, 873a, 876a Fischer ac- cepts, 875a, 881a Krüss resigns, 890a Richter joins, 890a Westphal resigns from, accepted, 77 meeting of, agenda, 881a past members, 873a, 889a Einstein-Szilard cooler, Zoelly interested in, 957a AE on obstacles in selling, 798 Einstein tensor, xliii–xliv, 286, 290–291n, 695n See also Gravitation tensor Eisenhart, Luther, 951a Eisenstein, Sergei, 511n Eisler, Robert (1882–1949), 161, 173, 308, 310, 903a book on Orphic mysteries, for AE, 886a on his difficult situation, 905a, 911a IIIC candidate for director of, AE endorses, failed, 86, 91 elected adjunct chief of university section of, 886a Luchaire on, 886a Schulze-Gaevernitz proposes post at, 907a Institut de France, lectures at on Flavius Jose- phus, 920a, 930a Rockefeller fellowship for, AE on, 400 solicits help for Paris positions, 906a, 933a solicits intervention with Babcock, 933a Flex- ner, 918a Przibram, 918a, 920a, 925a, 933a Elbogen, Ismar on position for Koigen, 910a speaker at rally of Keren Hayesod, 906a Electricity AE on whether continuous or not, xlvi and direction of time, AE on, 170 Electrodynamics of moving bodies, AE on Lo- rentz’s theory, 54 Electrolysis of water, Hausmeister on, 875a Electron AE on, 241, 300, 436, 807 and general relativ- ity, 165–171, 367–368 angular momentum of, 422, 428–429, 430 charge difference with proton, 165–171, 191 measurement of AE on, 43, 57, 671 Piccard on, 40, 41–43 Wigand on, 874a Wolfke on, 229 publication on Piccard on, 878a charge of, Ehrenhaft measurements, on, 959a equations of motion of, AE on, 493, 807, 1027 Rainich on, 486 Weyl on, 741–742 as singularity, 436, 485, 493, 685, 695n solutions representing, 485, 493, 695n repre- senting two electrons at rest, 493, 683–684 spin, lxxxii and general relativity, Sommerfeld on, 552 internal necessity of, AE misses, 563 introduction of, 424n structure of, Hirsch on, 927a Electron model, Lorentz on, 218–220 Electron solutions, in a unified field theory, lii, 64, 65n, 165–171, 319, 368n Electrophysical research in Germany, General Electric sponsors, Haber on, 937a Elsasser, Walter (1901–1994), on matter waves, Born on, 70, 72n Emanuel, David (1854–1941), 942a Emden, Robert (1862–1940), on aberration, 320, 902a AE on, 321–322 Enciclopedia Italiana, invites AE to collabo- rate on, 892a on format of contributions to, 957a Encyclopædia Britannica, AE’s articles for, 256–266, 267–271, 386, 880a, 886a, 898a, 899a, 908a, 911a, 913a